84519842819 has 2 divisors, whose sum is σ = 84519842820. Its totient is φ = 84519842818.

The previous prime is 84519842761. The next prime is 84519842857. The reversal of 84519842819 is 91824891548.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84519842819 is a prime.

It is a super-2 number, since 2×84519842819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84519842219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42259921409 + 42259921410.

It is an arithmetic number, because the mean of its divisors is an integer number (42259921410).

Almost surely, 2^84519842819 is an apocalyptic number.

84519842819 is a deficient number, since it is larger than the sum of its proper divisors (1).

84519842819 is an equidigital number, since it uses as much as digits as its factorization.

84519842819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 59.

The spelling of 84519842819 in words is "eighty-four billion, five hundred nineteen million, eight hundred forty-two thousand, eight hundred nineteen".